VIDEO PROBLEMS
1.
Monitor appears non-functional, but audio is present and controls operate as expected,
A:
Unlock and open the rear door. Verify that A.C Power is connected to the Video Monitor. Inspect
the neck of the CRT under low light level conditions. A glow will be seen near the CRT base if
there IS voltage in the filament circuits This does not mean that other voltages or signals are as
they should be, but it does indicate that some of the monitor circuits are receiving power.
B,
Turn OFF the game power. Verify that the Video Signal and the Remote Adjustment Board
connectors are fully seated on the Video Monitor Board Assembly. Check the other monitor
connectors in the same way. Do not operate a monitor without a Remote Adjustment Board.
C:
Examrne the A.C. line fuse on the Vrdeo Monrtor Board Assembly. If the fuse is faulty, replace it
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an identical fuse of the proper voltage and current rating.
D:
Ensure that no loose parts or
wares
are caught on the chassis or the mounting brackets.
>
E.
Check that the brightness (intensity) and contrast have not been set to therr minimum levels
F:
Verify that the Video Monitor is operating correctly by placing it
In
a known good unit
2:
The power-up self-test will run, but the game does not appear. No audio is present.
A:
Note and record any error messages that occur during self-test. Open the corn door. Press and
hold the BEGIN TEST switch
:o
enter the menu system. Select DIAGNOSTICS from the Main
menu. Once in the DIAGNOSTICS menu, choose DISK TESTS (refer to Section One for
addrtional details). Use
thus
set of tests to check the operation of critical components.
B:
Turn OFF the game power, Unlock and remove the rear door. Inspect the CPU Board Assembly
Ensure that the JAMMA cable connector is fully seated into the mating edge connector on the
CPU Board Check the other cable connectors for correct alignment and continuity.
CAM/ON: DO NOT REMOVE OR INSTALL ANY CONNECTOR WHEN POWER IS TURNED ON.
THIS WILL DAMAGE THE CPU BOARD OR HARD DISK DRIVE AND VOID THE WARRANTY.
C-
Verify that the ROM instruction set is correct for this game. There is more than one ROM
In
a
game set Each ROM circuit is labeled
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the assembly number and the software version.
D:
Verify that the CPU Board Assembly is correct for this game. Each CPU Board is marked with the
manufacturer name, assembly number and the hardware version.
E: Verify that the Hard Disk Drive Assembly is correct for this game. Each Hard Disk Drive
I!’
.L
is
marked with the manufacturer name, assembly number and the program version.
F. Turn ON the game power. Using the 20 Volt D.C. setting on a digital voltmeter, measur
voltages present at the Power connector pins. Verify the +SJ source if it is adjustable. I
’
the Cabrnet Wiring Diagram (Section Three) for specific wiring information and voltage
limit?
G: Using the 2 Volt A.C setting on a drgital voltmeter, measure the same D.C. voltages
:;:
Any reading indicates that the supply voltages are unstable and may contain ripple or
noi..,.
H,
Compare CPU Board jumper positions
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the CPU Jumper Status Chart (Section Three\
I,
Compare CPU Board Light Emitting Diode states with the CPU Indicator Chart
(Sectior-
4-7
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